busybox/miscutils/mt.c
Rob Landley d921b2ecc0 Remove bb_ prefixes from xfuncs.c (and a few other places), consolidate
things like xasprintf() into xfuncs.c, remove xprint_file_by_name() (it only
had one user), clean up lots of #includes...  General cleanup pass.  What I've
been doing for the last couple days.

And it conflicts!  I've removed httpd.c from this checkin due to somebody else
touching that file.  It builds for me.  I have to catch a bus.  (Now you know
why I'm looking forward to Mercurial.)
2006-08-03 15:41:12 +00:00

121 lines
2.2 KiB
C

/* vi: set sw=4 ts=4: */
/*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include "busybox.h"
#include <sys/mtio.h>
struct mt_opcodes {
char *name;
short value;
};
/* missing: eod/seod, stoptions, stwrthreshold, densities */
static const struct mt_opcodes opcodes[] = {
{"bsf", MTBSF},
{"bsfm", MTBSFM},
{"bsr", MTBSR},
{"bss", MTBSS},
{"datacompression", MTCOMPRESSION},
{"eom", MTEOM},
{"erase", MTERASE},
{"fsf", MTFSF},
{"fsfm", MTFSFM},
{"fsr", MTFSR},
{"fss", MTFSS},
{"load", MTLOAD},
{"lock", MTLOCK},
{"mkpart", MTMKPART},
{"nop", MTNOP},
{"offline", MTOFFL},
{"rewoffline", MTOFFL},
{"ras1", MTRAS1},
{"ras2", MTRAS2},
{"ras3", MTRAS3},
{"reset", MTRESET},
{"retension", MTRETEN},
{"rewind", MTREW},
{"seek", MTSEEK},
{"setblk", MTSETBLK},
{"setdensity", MTSETDENSITY},
{"drvbuffer", MTSETDRVBUFFER},
{"setpart", MTSETPART},
{"tell", MTTELL},
{"wset", MTWSM},
{"unload", MTUNLOAD},
{"unlock", MTUNLOCK},
{"eof", MTWEOF},
{"weof", MTWEOF},
{0, 0}
};
int mt_main(int argc, char **argv)
{
const char *file = "/dev/tape";
const struct mt_opcodes *code = opcodes;
struct mtop op;
struct mtpos position;
int fd, mode;
if (argc < 2) {
bb_show_usage();
}
if (strcmp(argv[1], "-f") == 0) {
if (argc < 4) {
bb_show_usage();
}
file = argv[2];
argv += 2;
argc -= 2;
}
while (code->name != 0) {
if (strcmp(code->name, argv[1]) == 0)
break;
code++;
}
if (code->name == 0) {
bb_error_msg("unrecognized opcode %s.", argv[1]);
return EXIT_FAILURE;
}
op.mt_op = code->value;
if (argc >= 3)
op.mt_count = atoi(argv[2]);
else
op.mt_count = 1; /* One, not zero, right? */
switch (code->value) {
case MTWEOF:
case MTERASE:
case MTWSM:
case MTSETDRVBUFFER:
mode = O_WRONLY;
break;
default:
mode = O_RDONLY;
break;
}
fd = xopen3(file, mode, 0);
switch (code->value) {
case MTTELL:
if (ioctl(fd, MTIOCPOS, &position) < 0)
bb_perror_msg_and_die("%s", file);
printf ("At block %d.\n", (int) position.mt_blkno);
break;
default:
if (ioctl(fd, MTIOCTOP, &op) != 0)
bb_perror_msg_and_die("%s", file);
break;
}
return EXIT_SUCCESS;
}